Tiger Woods is back on the injured reserve list. The 43-year-old announced Monday he has withdrawn from this week’s Arnold Palmer Invitational with a neck strain.

Woods made sure to clarify — on Twitter — that this injury is not related to his oft-injured lower back, and that he has no long-term concerns. He also noted that he is hopeful to return next week at the Players Championship at TPC Sawgrass.

Woods said this neck strain is something he’s been dealing with for weeks, and while he’s been receiving treatment for it, it “hasn’t improved enough to play.” He played back-to-back weeks at the Genesis Open and the WGC-Mexico, finishing in the top 20 each time, before sitting out the Honda Classic.

The 14-time major winner also apologized to the Palmer family, calling the event one of his favorite tournaments. Woods has won the Bay Hill event eight times and nearly added a ninth title last year.